Daoust or D'Aoust is a French surname and may refer to:
People Charles Daoust (1825–1868), Canadian politician Jean-Baptiste Daoust (1817–1891), MP for Deux-Montagnes, Quebec, Canada Mélodie Daoust (born 1992), Canadian hockey player Sévère D'Aoust, first colonizer of Sarsfield, Ontario, Canada Sylvia Daoust (1902–2004), Canadian sculptor Dan Daoust (born 1960), Canadian ice hockey player Other Daoust's Corner, former name of Sarsfield, Ontario, Canada Daoust Lestage, a Canadian architectural firm